Make sure project and task ids do not get assigned multiple times

atlas_server/src/db.py

@@ -174,8 +174,8 @@ class Database(object):
                                     key_value_dict=key_value_dict,
                                     operation="set")
 
-        def get_project_by_id(self, project_id):
-            """
+    def get_project_by_id(self, project_id):
+        """
         Get a project with a given id.
 
         Args:
@@ -184,7 +184,6 @@ class Database(object):
         Returns:
             atlas_server.models.Project
         """
-
         project = self.projects.find_one({"project_id": project_id})
         if not project:
             raise ProjectNotFoundError(project_id=project_id)
@@ -269,7 +268,7 @@ class Database(object):
                 new_task_id = max(task.task_id for task in project.tasks) + 1
             project_ids.insert_one({"project_id": project_id, "next_task_id": new_task_id})
         else:
-            new_task_id = project_ids.next_task_id
+            new_task_id = project_ids["next_task_id"]
 
         task.task_id = new_task_id
         # Add created and modified info to task